Top 20 NuGet AJAX Packages

Lightweight Json parser for .NET
Avro provides: Rich data structures. A compact, fast, binary data format. A container file, to store persistent data. Remote procedure call (RPC). Simple integration with dynamic languages. Code generation is not required to read or write data files nor to use or imple...
Typed and validated application configuration settings. Allows backup configuration such as parent / child settings. Based off ConfigurationManager, JSON, and Environment Variables.
Generic Json extension for CloudNative.CloudEvents
Extensions for Newtonsoft.Json to support JSON fragments.
A lightweight and fast Json Schema validation package
Yari for MySql databases. Easily execute mysql stored procedures and functions from the browser; just deploying a single method Web.API service. Also useful to create a Data Access Layer for mysql in any .net core application
Builds on Microsoft.AspNetCore.JsonPatch to generate JSON patch documents by comparing or observing changes to C# objects.
A library containing useful JSON serialization classes.
JsonStream is a thread-safe dotNet Standard Class Library to make easy to read and to write json structures from/to a stream.
Lightweight json-based app and user settings, with support for DPAPI encryption
Easy way to serialize/deserialize objects to/from an async stream
Read data from strings in XML/JSON/YAML/CSV formats into a tree structure. Create data nodes manually and serialize it back to those formats.
A simple, lightweight and mockable C# Rest client focused on JSON but works also with XML, plain text and raw bytes, built on top of HttpClient, Newtonsoft.Json and XmlSerializer.
HTTP API client, wraps System.Net.Http with handy helpers
An asynchronous JSON RPC server & client library.
A library that lets you serialize any ContentData object by simply calling .Serialize or .ToJson on it.
Fuzzy Serializer is a contract resolver for Newtonsoft, which enables the serializer to ensure clients deserializing the message, will respect Postels Law ("be liberal in what you accept from others").
Unix time stamp converter for Json.NET
Extends Microsoft.Extensions.Configuration.Json with a more convenient .AddJsonFile().